TM-9-2350-273-BD
M48/M60 SERIES TANK, COMBAT FULL-TRACKED 105-MM GUN
TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; BATTLEFIELD DAMAGE ASSESSMENT AND REPAIR
TM-9-2350-273-BD - Page 156 of 288
TM 9-2350-273-BD
CHAPTER 11
COMMUNICATION SYSTEMS
BDAR FIXES SHALL BE USED ONLY IN COMBAT
AT THE DISCRETION OF THE COMMANDER
AND SHALL BE REPAIRED BY STANDARD MAINTENANCE PROCEDURES
AS SOON AS PRACTICABLE AFTER THE MISSION IS COMPLETED.
SECTION I. General
11-1. Scope.
This chapter contains the fault assessment and expedient repair procedures
needed to locate and fix battlefield damage to the vehicle’s communications system.
11-2. General.
The procedures in this chapter are used to repair battlefield damage to the
AN/VIC-1 intercommunications set, the radio systems, the KY-57 (KY-38) speech
security system and all associated wiring and cables.
11-3. Functional Details.
a. The AN/VIC-l intercom set consists of the AM-1780 amplifier, four C-2298 or
C-10456 control boxes, one C-2742 remote switching control box, four CVC helmets and
all associated wiring and cables.
The AN/VIC-1 allows voice intercom to take place
between the vehicle commander and all crew members.
b. Three basic configurations of radio systems are installed in most tracked
vehicles.
All three radio systems supply non-secure frequency modulation (FM) voice
radio capabilities through the AN/VIC-1 intercom set to the tank commander and all
crew members.
All three radio systems utilize the MT- 1029 mount for the basic
receiver-transmitter and the MT- 1898 mount for the auxiliary receiver. The MX-6707
matching unit is used in conjunction with all receiver-transmitters and the AB-558 mast
base is used in conjunction with the auxiliary receivers.
The AS- 1729 antenna system is
used with all receiver-transmitters and either the MS-116A, MS-117A, and the MS-118A
antenna elements or the AT-1095 antenna element is used with the auxiliary receivers.
All associated wiring and cables are the same for each system.
(1) The AN/VRC-12 consists of a RT-246 receiver-transmitter with 10 preset
channels which can be automatically switched and tuned by means of the C-2742
remote switching control box and a R-442 auxiliary receiver.
11-1
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